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' W; F. KISTNER.

Bracelet.

N 2; 237 ,O25. Patented Jan. 25,1881.

INVENTOR WITNESSES ATTORNEYS.

N-PEIERS. PHDTDJJTHOBHPHER. WASHINGTON. D. O.

UNITED STATES PATENT OFFICE.

FRIEDRICH W. F. KISTNER, OF NORTH ATTLEBOROUGH, ASSIGNOR OF ONE- FOURTH TO EDWARD WEHRLIN, OF ATTLEBOROUGH, MASS.

BRACELET.

SPECIFICATION forming part of Letters Patent No. 237,025, dated January 25, 1881.

' Application filed October 23,1880. (ModeL) To all whom it may concern.-

Be it known that I, FRIEDRICH W. F. Krsr- NER, of North Attleborough, in the county of Bristoland State of Massachusetts, have invented a newand ImprovedBracelet, of which the following is a description.

The object of my invention is to provide a new and improved bracelet which is simple in construction, locks itself automatically by means ofa spring, and can be put on or taken 0E without requiring the hand to be passed through it, as is necessary with most other bracelets made heretofore.

The invention consists in a bracelet formed of a stiff hollow semicircular or like part, to the ends of which two hollow quadrants are pivoted in such a manner that they can swing in a plane at right angles to the plane of the bracelet, these quadrants being drawn inward or closed, when released, by a torsion-spring wire passing through the rigid and hinged parts of the bracelet.

In the accompanying drawings, Figure 1 is a plan view of my improved bracelet. Fig. 2 is a longitudinal sectional elevation through the joint of the same. Fig. 3 is an elevation of this joint, showing the parts extended. Fig. at

is a cross-sectional elevation on the line :0 m,

Fig. 2. Fig. 5 is a cross-sectional elevation on the line y y, Fig. 2. Fig. 6 is a perspective view of my improved bracelet, showing the pivoted parts turned outward to admit the wrist into the, bracelet.

Similar letters of reference indicate corresponding parts.

The bracelet consists of a stiff and rigid semicircular or semi-elliptical hollow part, A, to the ends of which the hollow wings or quadrants B B are pivoted in such a manner that they can swing outward in a plane at right angles to the plane of the bracelet.

The ends of the rigid hollow part A are provided with a semicircular shoulder, O, on the outer surface of the semicircle, so that corresponding recesses DD are formed on the opposite inner surfaces.

The hollow quadrants or wings B B are provided with tubular pintles E E, fitting into the opening of the rigid part A at the inner ends, and these pintles have a quarter-circle transverse slot, F, at or near the middle, and a quarter-circle shoulder, G, at the base, of the pintle.

The rigid part A is provided with an aperture, H, near the end, through which aperture a pin or stud, J, is passed, so as to project into the slot F of the pintle E. The stud J is preferably attached to a strip of metal, K, which is held between annular shoulders L L, which also serve as ornaments for the joint. A torsion-spring wire, M, is passed through the part A, and the hollow quadrants are then attached to the ends of the part H, the ends of the spring-wire M passing into the quadrants. The stud J prevents the hollow quadrants from being drawn out of the ends of the part A, but at the same time permits these quadrants to rotate the distance of a quarter of a circle. The shoulder Gr at the base of the pintle E slides in the recesses D D, and also prevents the hollow wings or quadrants from rotating more than ninety degrees, for the recess D is one hundred and eighty degrees, and the shoulder G is ninety degrees; consequently but ninety degrees remain to move in.

The bracelet may be made of any desired pattern, and the outer ends, 0 O, of the hollow quadrants may be arranged more or less close to each other.

The operation is as follows: Fig. l represents the bracelet in its normal position, in which there is no strain on the spring-wire M; but if the wings or quadrants B are rotated outward the tension of the torsion-sprin g will have a tendency to draw them back to the normal position, and will do so as soon as they are released, as indicated by the arrows at in Fig. 6. To put on the bracelet, it is placed flat upon the wrist, and then the hinged parts are depressed, causing them to give until they have surrounded the wrist, when they are antomatically closed by the wire and spring. The hinged parts may be toward the elbow or hand when the bracelet is being put on, the former position being preferred, as the bracelet will not be opened by being drawn toward the elbow. To take off the bracelet the same is simply moved in the same direction as it was in putting it on.

This bracelet requires no locks, cannot be taken off or drop ofit' accidentally, as it requires the assistance of the other hand, and

the hand need not be forced through it, as is rigid part A, of the quadrant wings B, the

necessary with bracelets in use at present.

Having thus described my invention, I claim as new and desire to secure by Letters Pat 5 ent- 10 acted upon bysprings, which keep them closed,

as set forth.

2. In a bracelet, the combination, with the rigid part A, of the pivoted quadrant-wings B and the spring-wire M, substantially as 15 herein shown and described, and for the pur pose set forth.

3. In a bracelet, the combination, with the spring-wire M, the pins J, and transverselyslotted tubular pintles E E, substantially as herein shown and described, and for the purpose set forth.

4. In a bracelet, the combination, with the rigid part A, having a semicircular shoulder, 0, at each end, of the quadrant-wings B, having a quadrant-shoulder, G, at the inner ends, and of the pintles E, substantially as herein shown and described, and for the purpose set forth.

FRIEDRICH Wl'LHELM FRANZ KIST'NER.

Witnesses EDWARD WEHRLIN, F. L. BURDEN. 

